BR,
Yes you have a very flexible .458 rifle.

My .458 rifle is an 1886 45-90 with 96% of the powder capacity of yours.
Most of my hunting has been with 300 grain bullets at velocities between 1800 and 2200 fps and this has been suitable for all deer, hogs, and several exotics.

For Africa, we hand loaded 300 grain Nosler PP bullets to 2200 fps and they were very effective for plains game and leopard.
For larger DG, (ele and Cape buff) we used 450 grain Kodiak FMJ and it proved to be excellent on Cape Buffalo and back in Texas, on Bison .
The Kodiak would have been OK for body shots on ele, but for frontal brain shots, 450 grain NF solids and Punch bullets were perfect- shot through head and into body.
You can load your rifle up or down and hunt most any medium to big to dangerous game with it.
Enjoy and Good Hunting!


CRS, NRA Benefactor Life Member, Whittington Center, TSRA, DWWC, DRSS
Android Reloading Ballistics App at http://www.xplat.net/